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Filtrete MPR / MERV guide

Pick the grade your blower can handle, then match the exact size stamped on the old filter frame.

Practical ladder

GradeTypical useWatch-outs
1085 MPRDust & pollen baselineStill measure HxWxD
1500 MPRCommon retail allergen step-upHigher restriction than cheap fiberglass
1900–2000 MPRPremium allergen marketing tiersConfirm furnace can handle pressure drop

Hard stops

  • Size mismatches leak dirty air around the filter
  • OEM media cabinets (Honeywell / Lennox / Trane) are not Filtrete retail sizes
  • When in doubt, buy the exact OEM media number for that cabinet